Atari BASIC A+

A disk-based extension to the original Atari BASIC, made by Shepardson Microsystems and distributed by Optimized Systems Software (OSS) in 1981. It modified some commands and made them faster, while bringing in 43 new instructions for graphics, games development and debugging.

Where it is/was used

• Atari 800

Noteworthy characteristics

Commands were implemented for accessing the Atari's "Player-Missile Graphics" (PMG) which had been ignored by the original Atari BASIC.

Environment and usage

The OS/A+ disk should be placed in drive 1 then the machine should be powered on. At the "D1:" prompt, typing BASIC would load the extension. From DOS, the LOAD BINARY FILE menu option could be used for loading A+ from its disk.

Extensions

Curiosities

Related to...

Influenced by

Influence for

Versions and successors

References

• OSS BASIC A+ for the ATARI 800. Optimized Systems Software. USA, 1981. Available at https://archive.org/details/Atari_OSS_BASIC_A_3.1_manual , last check 2023-03-15
• REISINGER, John M. A+ Programming in Atari BASIC. Reston Publishing. USA, 1984. Available at https://archive.org/details/APlusProgrammingInAtariBasic , last check 2023-03-15
• DUNN, Mike. A New Basic for the Atari. Available at https://www.atariarchives.org/creativeatari/A_New_Basic_For_the_Atari.php , last check 2023-03-16